SOLUTION: Managers at an automobile manufacturing plant would like to examine the mean completion time, , of an assembly line operation. The past data indicate that the mean completion time

Question 1042474: Managers at an automobile manufacturing plant would like to examine the mean completion time, , of an assembly line operation. The past data indicate that the mean completion time is minutes, but the managers have reason to believe that this value has increased. The managers plan to perform a statistical test.
After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of minutes.
1.
What are the null hypothesis (H0) and the alternative hypothesis (H1)

2.Suppose that the managers decide to reject the null hypothesis. What sort of error might they be making?
tyoei/tyoe ii?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Note:: The minute numbers are missing from your post.
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The answer to the 2nd part of your question is Type I.
Cheers,
Stan H.
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Note:: Type I Error:: You reject Ho when in fact it is true
Type II Error:: You fail to reject Ho when in fact it is false.

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